Text and Data Mining valid from 2019-02-04
Received: 13 October 2018
Accepted: 29 January 2019
First Online: 4 February 2019
Compliance with ethical standards
: This work was carried out after approval was obtained from the ethical committee on the care and use of animals in research of Ahmadu Bello University, Zaria, Nigeria.
: The authors declare that they have no conflict of interest.